Background: Selenium deficiency appears to limit antioxidant defense in obese individuals. This study evaluated the association between adiposity indices, selenium status, and oxidative stress in obese women. Methods: This was a cross-sectional study involving 139 women who were divided into the following two groups: the case group (obese women, n = 63) and the control group (normal-weight women, n = 76). Plasma, erythrocyte, and urinary selenium levels were determined using inductively coupled plasma optical emission spectrometry. Body weight, height, waist circumference, hip circumference and neck circumference were measured. Body mass index, waist/height ratio, conicity index, body fat index, body adiposity index, body circularity index, and visceral adiposity index were calculated. Plasma levels of thiobarbituric acid reactive substances were determined. The erythrocyte glutathione peroxidase activity was determined using an automatic biochemical analyzer and Ransel kit. Results: Obese women had selenium deficiency characterized by reduction in plasma and erythrocyte concentrations (P < .001). The urinary selenium excretion was higher in the case group compared to the control group (P < .001).Adiposity indices values and plasma concentrations of thiobarbituric acid reactive substances were significantly elevated in obese women (P < .001). There was a significant association between adiposity indices and selenium status (P < .001), and between erythrocyte selenium and erythrocyte glutathione peroxidase activity (P < .001). Conclusion:Obese women evaluated in the study have reduced plasma and erythrocyte concentrations of selenium and an increased urinary excretion of selenium. The correlation analysis reveals an association between intra-abdominal fat accumulation and selenium metabolism and oxidative stress.

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Avaliar o estado do peso e a composição corporal de mulheres sobreviventes do câncer de mama após tratamento oncológico. Metodologia: Trata-se de estudo clínico do tipo antes e depois, em que 27 pacientes sobreviventes do câncer de mama foram avaliadas antes (T0) e depois (T1) do tratamento oncológico (cirúrgico e clínico). Aferiram-se peso atual e estatura para definição do índice de massa corporal (IMC). A avaliação da composição corporal deu-se por impedância bioelétrica tetrapolar, sendo aferidos percentual de massa gorda e de massa magra e ângulo de fase. Aplicou-se o teste t de Student para avaliar a diferença de médias das variáveis antropométricas e de composição corporal entre T0 e T1, bem como o teste de McNemar para avaliar diferenças na prevalência de sobrepeso, adotando significância de 5%. Resultados: As pacientes têm aumento médio de 2,6 kg após o tratamento (p= 0,00) e 1,15 kg/m 2 no IMC (p= 0,00). O percentual de massa gorda aumenta 0,6% (p= 0,003) e há redução na massa magra (p=0,03) no T1. Em relação ao ângulo de fase, há diminuição média de 0,6 (p=0,026) após o tratamento. Conclusão: Mulheres sobreviventes do câncer de mama têm aumento de adiposidade, redução da massa magra e piora da integridade celular após o tratamento oncológico, o que sugere acréscimo de fatores de risco para recidiva da doença.

Background Patients with congenital generalized lipodystrophy (CGL) have very low levels of leptin and are described as having a voracious appetite. However, a direct comparison between CGL and eutrophic individuals is lacking, regarding both appetite parameters and acylated ghrelin, the hormone form that is active in acute food intake stimulation. The objective of the present study was to address whether and in what extent the subjective appetite parameters and acylated ghrelin response to a meal are affected in CGL individuals, in comparison to eutrophic individuals. Additionally, an obese group was included in the study, to allow the comparison between a leptin-resistant and a leptin-deficient condition on these aspects. Methods Eutrophic controls (EUT, n = 10), obese subjects (OB, n = 10) and CGL (n = 11) were fasted overnight and then received an ad libitum meal. Blood was collected and the visual analogue scale was applied before and 90 minutes after the meal. An additional blood sample was collected at 60 minutes for ghrelin determination. Results The CGL patients showed low fasting levels of leptin and adiponectin, dyslipidemia, and insulin resistance. The caloric intake was similar among the 3 groups. However, both CGL (p = 0.02) and OB (p = 0.04) had shorter satiation times than EUT. The CGL patients also had lower satiety time (p = 0.01) and their sensation of hunger was less attenuated by the meal (p = 0.03). Fasting acylated ghrelin levels were lower in CGL than in EUT (p = 0.003). After the meal, the levels tended to decrease in EUT but not in CGL and OB individuals. Conclusion The data indicate that, although not hyperphagic, the CGL patients present appetite disturbances in relation to eutrophic individuals. Their low fasting levels of acylated ghrelin and the absence of the physiological drop after meal intake suggest a role of these disturbances in hunger attenuation and satiety but not in acute satiation.

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